Update to specification from 8d57eba286de756176892518a8fc39b0ac2ccefb

Author: a2a-bot

src/a2a/types.py

@@ -830,7 +830,7 @@ class PushNotificationConfig(A2ABaseModel):
     """
     id: str | None = None
     """
-    A unique ID for the push notification configuration, created by the server
+    A unique ID for the push notification configuration, set by the client
     to support multiple notification callbacks.
     """
     token: str | None = None